/ Case study · PCB design · Client: Tech IQ

GSM Relay Control Board

A custom controller PCB with a SIM800L GSM module, on-board power regulation and a 16-channel 10 A relay bank for switching pumps and loads over the mobile network.

What we built

Designed and assembled in-house: a main controller board with a SIM800L GSM modem, buck-converter power stage and screw terminals, paired with a 16-channel relay board rated at 10 A per channel.

It lets sites without Wi-Fi or wired internet control pumps, lights and machinery remotely over the cellular network.

  • PCB
  • GSM / SIM800L
  • Relays
  • Power electronics
GSM Relay Control Board, photo 1 of 2
GSM Relay Control Board, photo 2 of 2

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